ᐅ Removing silicate exterior plaster. What is the best method? Sanding... with what?
Created on: 5 Nov 2013 17:03
N
nadam1A
AallRounder6 Nov 2013 07:39Hello,
In my opinion, removing the plaster again would be too complex and also too risky. If the reinforcement and the Styrofoam insulation underneath were damaged in the process, it could cause serious problems.
What do you think about smooth-filling the entire surface with a low-stress renovation plaster or adhesive filler, followed by a second attempt with silicate plaster? Since you already have the mesh, you effectively have a decoupling layer from the Styrofoam, which you can continue to use without damaging it.
Best regards,
AallRounder
In my opinion, removing the plaster again would be too complex and also too risky. If the reinforcement and the Styrofoam insulation underneath were damaged in the process, it could cause serious problems.
What do you think about smooth-filling the entire surface with a low-stress renovation plaster or adhesive filler, followed by a second attempt with silicate plaster? Since you already have the mesh, you effectively have a decoupling layer from the Styrofoam, which you can continue to use without damaging it.
Best regards,
AallRounder
A
AallRounder7 Nov 2013 07:15Hello,
How am I supposed to answer this if I’m not allowed to post company names and links here? Just search on Google for "repair mortar for silicate plaster" and read the technical datasheets of the plasters you find to see if they are suitable.
But seriously: since the first amateur plastering job has already gone wrong (if I understand correctly), do you really want to continue doing it yourself? Applying a thin decorative render is actually one of the easier tasks; with some practice, you can cover an entire gable wall that is 8m (26 feet) wide and 7m (23 feet) high alone and without breaks in 6-7 hours of continuous work. No pauses allowed because of seams. You jump from one corner to another to prevent any overlapping areas from drying. If you don’t do it alone but with several people, the result is often suboptimal. I always find it amusing when I visit construction sites and so many multicultural workers are on the scaffolding that you can hardly see the facade anymore. Everyone rubs in their own way, as often and as “nicely” as they like. One does it diagonally, another horizontally, the next overworked it, and someone else just dabbed it on. Then you end up with a facade showing the handiwork of a dozen unskilled helpers who are presented by the company as “experts.”
Okay, I’m also 99% a do-it-yourselfer, but I didn’t start plastering on house walls — I began with underground basement wall plaster that was covered with bitumen, so surface quality mistakes were not critical. Gradually, I improved and only after some practice did I plaster the first house (base coat 20mm (0.8 inches) + fine decorative render 3-5mm (0.1-0.2 inches)). By now, after nearly 20 years of amateur construction and at least 100 tons of various hand-applied mortar, it has become routine. But you have to get there first.
If you want to hire a company after all, make sure they also do the base plastering. They should know what materials to use.
Regards,
AallRounder
How am I supposed to answer this if I’m not allowed to post company names and links here? Just search on Google for "repair mortar for silicate plaster" and read the technical datasheets of the plasters you find to see if they are suitable.
But seriously: since the first amateur plastering job has already gone wrong (if I understand correctly), do you really want to continue doing it yourself? Applying a thin decorative render is actually one of the easier tasks; with some practice, you can cover an entire gable wall that is 8m (26 feet) wide and 7m (23 feet) high alone and without breaks in 6-7 hours of continuous work. No pauses allowed because of seams. You jump from one corner to another to prevent any overlapping areas from drying. If you don’t do it alone but with several people, the result is often suboptimal. I always find it amusing when I visit construction sites and so many multicultural workers are on the scaffolding that you can hardly see the facade anymore. Everyone rubs in their own way, as often and as “nicely” as they like. One does it diagonally, another horizontally, the next overworked it, and someone else just dabbed it on. Then you end up with a facade showing the handiwork of a dozen unskilled helpers who are presented by the company as “experts.”
Okay, I’m also 99% a do-it-yourselfer, but I didn’t start plastering on house walls — I began with underground basement wall plaster that was covered with bitumen, so surface quality mistakes were not critical. Gradually, I improved and only after some practice did I plaster the first house (base coat 20mm (0.8 inches) + fine decorative render 3-5mm (0.1-0.2 inches)). By now, after nearly 20 years of amateur construction and at least 100 tons of various hand-applied mortar, it has become routine. But you have to get there first.
If you want to hire a company after all, make sure they also do the base plastering. They should know what materials to use.
Regards,
AallRounder
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